37 lines
1.9 KiB
Factor
37 lines
1.9 KiB
Factor
USING: help.syntax help.markup kernel math classes classes.tuple
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calendar models ;
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IN: models.compose
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HELP: compose
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{ $class-description "Composed model values are computed by collecting the values from a sequence of underlying models into a new sequence. Composed models are automatically updated when underlying models change. Composed models are constructed by " { $link <compose> } "."
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$nl
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"A composed model whose children are all " { $link "models-range" } " conforms to the " { $link "range-model-protocol" } " and represents a point in n-dimensional space which is bounded by a rectangle." }
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{ $examples
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"The following code displays a pair of sliders, and an updating label showing their current values:"
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{ $code
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"USING: models models.compose models.range ui.gadgets"
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"ui.gadgets.labels ui.gadgets.packs ui.gadgets.panes"
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"ui.gadgets.sliders ;"
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""
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": <funny-model> ( -- model ) 0 10 0 100 <range> ;"
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": <funny-slider> ( model -- slider ) horizontal <slider> ;"
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""
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"<funny-model> <funny-model> 2array"
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"[ <pile> [ horizontal <slider> add-gadget ] reduce gadget. ]"
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"[ <compose> [ unparse ] <filter> <label-control> gadget. ]"
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"bi"
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}
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} ;
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HELP: <compose>
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{ $values { "models" "a sequence of models" } { "compose" "a new " { $link compose } } }
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{ $description "Creates a new instance of " { $link compose } ". The value of the new compose model is obtained by mapping the " { $snippet "value" } " slot accessor over the given sequence of models." }
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{ $examples "See the example in the documentation for " { $link compose } "." } ;
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ARTICLE: "models-compose" "Composed models"
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"Composed model values are computed by collecting the values from a sequence of underlying models into a new sequence."
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{ $subsection compose }
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{ $subsection <compose> } ;
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ABOUT: "models-compose"
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